package com.osig.sys.security;
/**
 * Copyright &copy; 2016 splat  All rights reserved.
 */


import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import javax.servlet.http.Cookie;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.Permission;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import com.osig.util.UserUtils;
import com.user.entity.emp.EmpVO;



/**
 * 系统安全认证实现类
 * @author splat
 * @version 2014-7-5
 */
@Service
//@DependsOn({"userDao","roleDao","menuDao"})
public class SystemAuthorizingRealm extends AuthorizingRealm {
	private Logger logger = LoggerFactory.getLogger(getClass());
	

	/**
	 * 认证回调函数, 登录时调用
	 */
	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authcToken) {
		UsernamePasswordToken token = (UsernamePasswordToken) authcToken;
		Principal principal = new Principal(token.getEmpV0());
		principal.setCookie(token.getCookie());
		principal.loginName = token.getUsername();
		principal.mobileLogin = false;
	
		return new SimpleAuthenticationInfo(principal,null,getName());
	}

	@Override  
	protected void assertCredentialsMatch(AuthenticationToken authcToken,  
	        AuthenticationInfo info) throws AuthenticationException {  
	    UsernamePasswordToken token = (UsernamePasswordToken) authcToken;  
	    // 若单点登录，则使用单点登录授权方法。  
	    
	    if("1".equals("1")){
	    	return;
	    }
	    
	    super.assertCredentialsMatch(token, info);  
	}  
	
	/**
	 * 这里要可以加权限系统的button级别的控制
	 * 授权查询回调函数, 进行鉴权但缓存中无用户的授权信息时调用
	 */
	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
		Principal principal = (Principal) getAvailablePrincipal(principals);
		// 获取当前已登录的用户
		/*if (!Global.TRUE.equals(Global.getConfig("user.multiAccountLogin"))){
			Collection<Session> sessions = getSystemService().getSessionDao().getActiveSessions(true, principal, UserUtils.getSession());
			if (sessions.size() > 0){
				// 如果是登录进来的，则踢出已在线用户
				if (UserUtils.getSubject().isAuthenticated()){
					for (Session session : sessions){
						getSystemService().getSessionDao().delete(session);
					}
				}
				// 记住我进来的，并且当前用户已登录，则退出当前用户提示信息。
				else{
					UserUtils.getSubject().logout();
					throw new AuthenticationException("msg:账号已在其它地方登录，请重新登录。");
				}
			}
		}*/
		//User user = getSystemService().getUserByLoginName(principal.getLoginName());
		/*if (user != null) {*/
		SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
		/*	List<Menu> list = UserUtils.getMenuList();
			for (Menu menu : list){
				if (StringUtils.isNotBlank(menu.getPermission())){
					// 添加基于Permission的权限信息
					for (String permission : StringUtils.split(menu.getPermission(),",")){
						info.addStringPermission(permission);
					}
				}
			}*/
			// 添加用户权限
			info.addStringPermission("user");
			info.addStringPermission("sys");
			// 添加用户角色信息
			/*for (Role role : user.getRoleList()){
				info.addRole(role.getEnname());
			}
			// 更新登录IP和时间
			getSystemService().updateUserLoginInfo(user);*/
			// 记录登录日志
			//LogUtils.saveLog(Servlets.getRequest(), "系统登录");
			return info;
		/*} else {
			return null;
		}*/
	}
	
	@Override
	protected void checkPermission(Permission permission, AuthorizationInfo info) {
		authorizationValidate(permission);
		super.checkPermission(permission, info);
	}
	
	@Override
	protected boolean[] isPermitted(List<Permission> permissions, AuthorizationInfo info) {
		if (permissions != null && !permissions.isEmpty()) {
            for (Permission permission : permissions) {
        		authorizationValidate(permission);
            }
        }
		return super.isPermitted(permissions, info);
	}
	
	@Override
	public boolean isPermitted(PrincipalCollection principals, Permission permission) {
		authorizationValidate(permission);
		return super.isPermitted(principals, permission);
	}
	
	@Override
	protected boolean isPermittedAll(Collection<Permission> permissions, AuthorizationInfo info) {
		if (permissions != null && !permissions.isEmpty()) {
            for (Permission permission : permissions) {
            	authorizationValidate(permission);
            }
        }
		return super.isPermittedAll(permissions, info);
	}
	
	/**
	 * 授权验证方法
	 * @param permission
	 */
	private void authorizationValidate(Permission permission){
		// 模块授权预留接口
	}

	/**
	 * 清空所有关联认证
	 * @Deprecated 不需要清空，授权缓存保存到session中
	 */
	@Deprecated
	public void clearAllCachedAuthorizationInfo() {
//		Cache<Object, AuthorizationInfo> cache = getAuthorizationCache();
//		if (cache != null) {
//			for (Object key : cache.keys()) {
//				cache.remove(key);
//			}
//		}
	}

	
	/**
	 * 授权用户信息
	 */
	public static class Principal implements Serializable {

		private static final long serialVersionUID = 1L;
		
		
		private EmpVO empV0;
		private String id; // 编号
		private String loginName; // 登录名
		private String name; // 姓名
		private boolean mobileLogin; // 是否手机登录
		private Cookie cookie;
//		private Map<String, Object> cacheMap;

		public Principal(){
			super();
		}
		public Principal(EmpVO empVO){
			this.empV0 = empVO;
		}
	

		public String getId() {
			return id;
		}

		public String getLoginName() {
			return loginName;
		}

		public String getName() {
			return name;
		}

		public boolean isMobileLogin() {
			return mobileLogin;
		}

//		@JsonIgnore
//		public Map<String, Object> getCacheMap() {
//			if (cacheMap==null){
//				cacheMap = new HashMap<String, Object>();
//			}
//			return cacheMap;
//		}

		/**
		 * 获取SESSIONID
		 */
		public String getSessionid() {
			try{
				return (String) UserUtils.getSession().getId();
			}catch (Exception e) {
				return "";
			}
		}
		
		@Override
		public String toString() {
			return id;
		}

		public Cookie getCookie() {
			return cookie;
		}

		public void setCookie(Cookie cookie) {
			this.cookie = cookie;
		}
		public EmpVO getEmpV0() {
			return empV0;
		}
		public void setEmpV0(EmpVO empV0) {
			this.empV0 = empV0;
		}
		

	}
}
